I'm in the midst of creating a database of library books for my own future reading. However, I'm noticing that when I type the call numbers into the form from the online catalog, I tend to switch numbers. For example, I'll read a call number with "79" in it and type it in as "97" because that is how the number registeres in my mind. I know dyslexia is a "b" registeres as a "d" and stuff like that, more in terms of letters, but could it be the case for numbers as well? I normally say the number out loud when I read it, then switch windows and type as I remember. I know I should probably use copy/paste but I have other things I need to keep fresh on the clipboard. I also was diagnosed two years ago with a non-verbal learning disability (instead of the performance IQ being much higher than the verbal, it's the other way around). What do you think?